VULNERABILITY INTELLIGENCE

CVE-2018-6557

CVSS score7 HIGH
EPSS probability0.36%
CISA KEVNot currently listed
Published2018-08-21
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled.

Weakness classification

  • CWE-59: Improper Link Resolution Before File Access ('Link Following')

Primary references